/Engine/Source/Runtime/GeometryCore/Public/Polygon2.h
Construct a rounded rectangle polygon
static [TPolygon2](API\Runtime\GeometryCore\TPolygon2)< T > MakeRoundedRectangle ( const [TVector2](API\Runtime\Core\Math\TVector2)< T > & Center, T Width, T Height, T Corner, int CornerSteps )